Hi Matthew, I was able to run the app successfully on the cluster and get data, thanks.
I am able to telnet from my local machine to one of the zookeeper nodes on port 2181 successfully also. I think the code might just be timing out on my machine. Is there a way to increase the timeout time? On the drivermanager object? Thanks From: Matthew Johnson [mailto:[email protected]] Sent: Tuesday, February 24, 2015 3:25 PM To: [email protected] Subject: RE: JDBC connection zookeeper error Hi John, If it didn’t return anything (as opposed to throwing an error) then I would assume it was actually able to connect but that the table has no data in it? Maybe try again, but try adding some logging before and after your select statement, for example printing out the size of the resultset? If you did not see the error about Zookeeper being unable to connect when you run it on your cluster, then that suggests to me that you are having the same problem I had with Zookeeper on Amazon servers. Are you able to connect to HBase using native HBase client (instead of Phoenix) and running a simple query? Before I replaced all my IP addresses with internal/external aliases, I was not able to query HBase from my local PC at all let alone with Phoenix. Cheers, Matt From: Brady, John [mailto:[email protected]<mailto:[email protected]>] Sent: 23 February 2015 21:43 To: [email protected]<mailto:[email protected]> Subject: RE: JDBC connection zookeeper error Hi Matthew, I tried using the full zookeeper quorum below. Do you need to specify the port 2181? I tried running the app on the cluster. It didn’t return anything therefore I presume it didn’t connect. It is just the example US_POPULATION table. This is my code: import java.sql.*; public class PhoenixJDBC { public static void main(String args[]) { try { //Register JDBC Driver Class.forName("org.apache.phoenix.jdbc.PhoenixDriver").newInstance(); Connection conn = DriverManager.getConnection("jdbc:phoenix:54.154.34.128,54.154.161.140,54.154.181.8","",""); //Create a Statement class to execute the SQL statement Statement stmt = conn.createStatement(); //Execute the SQL statement and get the results in a Resultset ResultSet rs = stmt.executeQuery("select * from US_POPULATION"); // Iterate through the ResultSet, displaying two values // for each row using the getString method while (rs.next()) System.out.println("Name= " + rs.getString("host")); } catch (SQLException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } } Thanks John From: Matthew Johnson [mailto:[email protected]] Sent: Monday, February 23, 2015 5:31 PM To: [email protected]<mailto:[email protected]> Subject: RE: JDBC connection zookeeper error Hi John, I cross-posted this on StackOverflow: Have you tried entering the full zookeeper quorum in your URL? Something like this (you say you have 3 zookeepers in your cluster, obviously replace IPs below to match your zk quorum): jdbc:phoenix:54.152.31.122,54.152.31.123,54.152.31.124 I had a problem on Amazon (is that where your cluster is?) where internal and external IPs were getting confused and zookeeper couldn't connect to HBase properly. I solved this (not the most scalable solution but it works!) by creating aliases in /etc/hosts on the machines in the cluster pointing at internal IP addresses, then on my local desktop using the same aliases but pointing to the external IPs. Then, altered my cluster setup to use aliases everywhere instead of IP addresses. Quick way to test if this is your problem - build your app, copy it onto one of the servers in your cluster, and see if it will run ok on there. Hope that helps! Cheers, Matt From: Nick Dimiduk [mailto:[email protected]<mailto:[email protected]>] Sent: 23 February 2015 17:25 To: [email protected]<mailto:[email protected]> Subject: Re: JDBC connection zookeeper error Can you double-check the Zookeeper quorum, port, and root node? The HBase Master web UI shows the first two, the third you can get to by looking at the output of zk_dump.jsp On Mon, Feb 23, 2015 at 8:58 AM, Brady, John <[email protected]<mailto:[email protected]>> wrote: Hi Matthew, Yes, I just doubled checked. The HBase master is running and I can access the HMaster status page – I can see the tables I created in Phoenix. Would you have any other ideas? Thanks From: Matthew Johnson [mailto:[email protected]<mailto:[email protected]>] Sent: Monday, February 23, 2015 3:13 PM To: [email protected]<mailto:[email protected]> Subject: RE: JDBC connection zookeeper error Hi John, Is your HBase Master running? (It shows up in linux process list as HMaster). Are you able to access the HMaster status page? (On mine, it is http://<ip<http://%3cip> address>:60010). Cheers, Matt From: Brady, John [mailto:[email protected]<mailto:[email protected]>] Sent: 23 February 2015 14:59 To: [email protected]<mailto:[email protected]> Subject: JDBC connection zookeeper error Hello, I have Phoenix installed on a 5 node Cloudera cluster with 3 zookeeper nodes. I’m trying to run a basic SQL command from the JDBC program below but I’m getting zookeeper errors. Could anybody advise? org.apache.phoenix.exception.PhoenixIOException: org.apache.hadoop.hbase.MasterNotRunningException: Can't get connection to ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase at org.apache.phoenix.util.ServerUtil.parseServerException(ServerUtil.java:108) at org.apache.phoenix.query.ConnectionQueryServicesImpl.ensureTableCreated(ConnectionQueryServicesImpl.java:832) at org.apache.phoenix.query.ConnectionQueryServicesImpl.createTable(ConnectionQueryServicesImpl.java:1126) at org.apache.phoenix.query.DelegateConnectionQueryServices.createTable(DelegateConnectionQueryServices.java:110) at org.apache.phoenix.schema.MetaDataClient.createTableInternal(MetaDataClient.java:1590) at org.apache.phoenix.schema.MetaDataClient.createTable(MetaDataClient.java:568) at org.apache.phoenix.compile.CreateTableCompiler$2.execute(CreateTableCompiler.java:175) at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:271) at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:263) at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53) at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:261) at org.apache.phoenix.jdbc.PhoenixStatement.executeUpdate(PhoenixStatement.java:1043) at org.apache.phoenix.query.ConnectionQueryServicesImpl$9.call(ConnectionQueryServicesImpl.java:1551) at org.apache.phoenix.query.ConnectionQueryServicesImpl$9.call(ConnectionQueryServicesImpl.java:1520) at org.apache.phoenix.util.PhoenixContextExecutor.call(PhoenixContextExecutor.java:77) at org.apache.phoenix.query.ConnectionQueryServicesImpl.init(ConnectionQueryServicesImpl.java:1520) at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(PhoenixDriver.java:162) at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver.connect(PhoenixEmbeddedDriver.java:126) at org.apache.phoenix.jdbc.PhoenixDriver.connect(PhoenixDriver.java:133) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at mysqljbdctest.PhoenixJDBC.main(PhoenixJDBC.java:15) Caused by: org.apache.hadoop.hbase.MasterNotRunningException: org.apache.hadoop.hbase.MasterNotRunningException: Can't get connection to ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$StubMaker.makeStub(HConnectionManager.java:1651) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$MasterServiceStubMaker.makeStub(HConnectionManager.java:1677) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getKeepAliveMasterService(HConnectionManager.java:1884) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHTableDescriptor(HConnectionManager.java:2671) at org.apache.hadoop.hbase.client.HBaseAdmin.getTableDescriptor(HBaseAdmin.java:397) at org.apache.hadoop.hbase.client.HBaseAdmin.getTableDescriptor(HBaseAdmin.java:402) at org.apache.phoenix.query.ConnectionQueryServicesImpl.ensureTableCreated(ConnectionQueryServicesImpl.java:764) ... 20 more package mysqljbdctest; import java.sql.*; public class PhoenixJDBC { public static void main(String args[]) { try { //Register JDBC Driver Class.forName("org.apache.phoenix.jdbc.PhoenixDriver").newInstance(); Connection conn = DriverManager.getConnection("jdbc:phoenix:54.152.31.122","",""); //Create a Statement class to execute the SQL statement Statement stmt = conn.createStatement(); //Execute the SQL statement and get the results in a Resultset ResultSet rs = stmt.executeQuery("select * from US_POPULATION"); // Iterate through the ResultSet, displaying two values // for each row using the getString method while (rs.next()) System.out.println("Name= " + rs.getString("host")); } catch (SQLException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } } ------------------------------------------------------------- Intel Ireland Limited (Branch) Collinstown Industrial Park, Leixlip, County Kildare, Ireland Registered Number: E902934 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). 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